UFS (Universal Flash Storage) Development History and Its Impact on the Industry

UFS is jointly promoted by JEDEC (Solid State Technology Association) and UFSA (UFS Association). It is based on the SCSI protocol and a serial interface, supporting full-duplex transmission and command queuing.

Its core positioning is “high performance and low latency”, designed specifically for flagship devices and high-speed workloads, and it has gradually replaced eMMC as the mainstream solution in the high-end market.

1. 2010 – Establishment of UFSA

① Key actions:

Brought together upstream and downstream companies across the industry chain to promote the open adoption of the UFS standard, clearly positioning it as a replacement for eMMC.

② Industry impact:

Established a unified technical roadmap and ecosystem, laying the foundation for future UFS version upgrades.

2. 2011 – UFS 1.0 / 1.1

① Key features:

Adopted a single-lane serial design based on the MIPI M-PHY 1.0 protocol, with peak bandwidth of about 300 MB/s; achieved full-duplex transmission for the first time.

② Industry impact:

Architecturally broke through the half-duplex limitation of eMMC, but performance was not significantly better than eMMC 5.0 at the time, so large-scale adoption was limited.

3. September 2013 – UFS 2.0

① Key features:

Introduced HS-Gear2 mode, upgraded to a dual-lane design, with peak bandwidth up to 800 MB/s; expanded data security features.

② Industry impact:

Bandwidth surpassed eMMC 5.0 for the first time, successfully entering the flagship smartphone market (such as the Samsung Galaxy S6 series), marking the beginning of high-end storage upgrades.

4. 2016 – UFS 2.1

① Key features:

Optimized sustained write performance; added HS-Gear3 as an optional mode, increasing peak bandwidth to 1.2 GB/s; improved command queue scheduling efficiency.

② Industry impact:

Became a standard configuration for Android flagship smartphones, significantly improving multitasking and large app loading speeds, and widening the user experience gap between high-end and mid-range devices.

5. January 2018 – UFS 3.0

① Key features:

Adopted the MIPI M-PHY 4.1 protocol, increasing single-lane bandwidth to 11.6 Gbps, with dual-lane peak bandwidth reaching 2.4 GB/s.

② Industry impact:

Performance doubled, fully supporting 4K video recording, large mobile games, and other high-speed scenarios, completely widening the performance gap with eMMC.

6. January 2020 – UFS 3.1

① Key features:

Introduced three major features: Write Booster, Deep Sleep, and Performance Throttling Notification; peak bandwidth increased to 2.9 GB/s.

② Industry impact:

Balanced high performance with low power consumption, becoming a core component of 5G flagship smartphones, and beginning to penetrate high-end industrial tablets and UMPCs.

7. 2022 – UFS 4.0

① Key features:

Based on the MIPI M-PHY 5.0 protocol, single-lane bandwidth reached 23.2 Gbps, with dual-lane peak bandwidth soaring to 4.8 GB/s; power consumption reduced by 50% compared to the previous generation.

② Industry impact:

Enabled demanding scenarios such as 8K video recording and real-time AR/VR data processing, pushing mobile storage into the “4 GB/s era.”

8. 2023 – UFS 4.1

① Key features:

Enhanced data integrity checking, optimized performance stability in high-temperature environments, and improved storage durability.

② Industry impact:

Further expanded into automotive intelligent systems and industrial-grade high-performance embedded devices, broadening the application scope of UFS.

Core Evolution Logic of UFS

UFS evolution has consistently focused on breaking performance bottlenecks—from overcoming eMMC’s half-duplex limitations, to maturing full-duplex transmission, command queuing, and high-speed serial interfaces, and finally to enhancing write acceleration, low power consumption, and durability.

Each generation delivers higher bandwidth, lower latency, and broader application scenarios, firmly securing UFS’s position in the high-end embedded storage market.